Fig of 3 signs is seen in?
**Core Concept**
The "Fig of 3" sign is a radiological finding typically associated with a specific abdominal condition. It refers to the appearance of an enlarged aorta, the superior mesenteric artery (SMA), and the inferior vena cava (IVC) on an abdominal CT scan or angiogram, resembling a three-leaf clover or a "figure of three".
**Why the Correct Answer is Right**
The Fig of 3 sign is seen in conditions where there is a significant dilatation of the abdominal aorta, often due to atherosclerosis or an abdominal aortic aneurysm (AAA). The SMA and IVC are also dilated due to the increased pressure and flow caused by the aortic dilatation. This sign is particularly notable in the context of aortic dissection or aneurysm, where the aorta is severely compromised.
**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect as the Fig of 3 sign is not typically associated with splenic artery aneurysms, which are more commonly seen as isolated lesions.
* **Option B:** This option is incorrect as the Fig of 3 sign is not a characteristic finding in pancreatic cancer, which may cause obstructive jaundice or pancreatic duct dilatation.
* **Option C:** This option is incorrect as the Fig of 3 sign is not a typical finding in appendicitis, which may cause pain, fever, and leukocytosis.
**Clinical Pearl / High-Yield Fact**
The Fig of 3 sign is a key radiological finding in the diagnosis of abdominal aortic aneurysms or dissections, and its recognition can aid in the prompt identification and management of these life-threatening conditions.
**Correct Answer:** C.